Q: "Please give me dimensions on this heated seat cushion. I sit long hours at a computer. My chair is not the best. And neither are the seats in my "beater" car. I'd like to be able to get a heated cushion with lumbar support that I can move from office seat to car seat, at least until I decide I want a second one. What device can I add so I can use this seat on AC power? Thanks. Mike.

Answer: The lumbar cushions have a cut-out that takes the pressure off tailbones. The memory foam are more firm than the regular foam as memory foam is more dense. These generally sell for $20 to $50, have no attachment strap (just place on the chair and sit on it). In contrast, the Lumex are retailed at over $275, have a gel center layer plus foam layers on top and bottom and have both side wedges for lateral stability and a center pommel for medial thigh support. More important they have a waterproof cover made to reduce shear/friction plus a strap for firm attachment to the chair. The purposes are to provide long-term skin protection and positioning for high-risk patients plus seating comfort.

She probably would be most comfortable with the Lumex seat cushions and either of the lumbar support cushions. Do realize that the Mabis cushion does have a strap for the back of the chair if slippage is a concern.

Thanks for your question. Please contact us if you need more information.

Q: "Do these heated car seat cushions heat for only a few minutes and then shut off. I see that the heated seat with high low switch indicates that."

Answer: As of this date, Safe Home is selling several different heated cushions that can be used in a car. The thermostat regulates the temperature so the turning on and off is subtle, not noticeable to the seated person. Each heated cushion has different features:

The ES-WA-9738 has a hi/low switch and a thermostat that turns the heat on and off to maintain a temperature of either 120 degrees F on the high setting or 90 degrees F on the low setting.

The WA-9888 is a heated seat with magnets and massage (optional) that can be used as a 12V heated seat cushion or on standard AC current with the adapter (included), Wagan did not supply us with a temperature for this unit. I used on in my office chair and I find the heat comfortable without being too hot.

Until I purchased a minivan with heated seats, I used the basic 9738 heated cushion. In comparison with my minivan seats, this cushion heated within a few minutes to toastly warm. I remember flying into Cedar Rapids from Minneapolis on a bitter cold day in January. Before I reach the tollbooth in the parking lot (and the Eastern Iowa lots are not far from the booth), my seat was warm through my coat. I turned the temperature to low before I got to I-380. I was not aware that the heat turned on and off as there is not signal.

My minivan seats never get that warm and I don't feel the heat for about 10 minutes in the winter. (I used my heated seats in the summer, too. Great on the back.)

Q: "Hello, I need at least a three inch boost to see the road. Will this cushion give me the boost or will it collapse? How firm is this cushion? Thanks," Eloise

The maximum thickness of this cushion is 3 inches. It is a fairly firm cushion. However, the compression you'll experience is also related to your weight. Our experience is that if a cushion is too firm, it is also uncomfortable. (We once received a sample of a thick booster cushion that was so firm that when a 200 pound employee stood on the cushion, it made barely a dent. Mom who was then 85 tried it and sent to back to us as too hard.).